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Selection of Overburden Parameters. In 1974, an initial examination of Seneca II-W overburden <br /> material was performed by Peabody Coal Company (Peabodyl. Because the analyses completed <br />• on these overburden cores did not meet the 1980 State and Federal requirements, additional <br /> analyses were requested (Starr, personal communication, 19801. In July 1980, a final list of <br /> parameters was decided upon by the Colorado Mined Land Reclamation Division ICMLRDI, <br /> Office of Surface Mining Reclamation end Enforcement (OSMREI, and Peabody. These <br /> parameters are as follows: <br /> - pH, paste <br /> - Conductivity IECI mmhos/cm at 25°C <br /> - Saturation Percentage ISPI <br /> - Particle Size 1% sand, clay, silt, end very fine sand) <br /> - Texture Class <br /> - Water Soluble Calcium (Cal, Magnesium IMgI, and Sodium INaI <br /> - Sodium Adsorption Ratio (SARI <br /> - Copper ICuI <br /> - Zinc IZnI <br /> - Boron IBI <br /> - Molybdenum IMoI <br /> - Selenium ISeI if the pH is less than 6.0 <br /> - Aluminum IAII <br /> -Cadmium (Cdl <br /> - Iron IFe) <br /> - Manganese IMnI <br /> - Lead (Pb) <br />During 1981, CMLRD drafted guidelines for collection of overburden geochemistry data. As a <br />result of discussion between Peabody and CMLRD personnel, four additional overburden cores <br />were deemed necessary to satisfy regulations regarding overburden analyses. These four cores <br />were analyzed for parameters listed above, including additional parameters specified in the <br />CMLRD's Baseline Hydrology Data Gathering Guidelines (September 16, 19811. The additional <br />parameters are as follows: <br />- Sulfate ISO41 <br />Nitrate-Nitrogen IN03-NI <br />- Fluoride IFI <br />• <br />9 Revised 9/98 <br />